{"answers":{"affected":"2 open source packages ship an affected version, including github.com/xuri/excelize/v2. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-107223 in the wild and no public exploit code.","fix":"Upgrade github.com/xuri/excelize/v2 to 2.11.1-0.20260807015645-a54c578af309 or later.","what":"CVE-2026-107223 is a high-severity denial of service vulnerability in qax-os excelize, published on 7 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-107223 and fix it if it is affected.\n\nWhat it is: CVE-2026-107223 is a high-severity denial of service vulnerability in qax-os excelize, published on 7 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-107223 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/xuri/excelize/v2 (Go): affected from 2.1.0; fixed in 2.11.1-0.20260807015645-a54c578af309\n- github.com/xuri/excelize/v2 (Go): affected from 2.1.0; fixed in 2.11.1-0.20260807015645-a54c578af309\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-107223/ (Markdown: https://insights.sbomify.com/CVE-2026-107223/index.md)","id":"CVE-2026-107223","markdown":"https://insights.sbomify.com/CVE-2026-107223/index.md","name":"CVE-2026-107223","record":{"aliases":["GHSA-fq3v-74gv-27gm"],"analysis":{"component_type":"library","fix_type":"no_fix_stated","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Go Excel library","requires_auth":"none","summary":"Attackers can cause denial of service via memory exhaustion or CPU hang in Excelize by crafting spreadsheets with oversized column attributes.","user_interaction":"required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"excelize","vendor":"excelize"}],"cvss":{"score":7.1,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-789","name":"Memory Allocation with Excessive Size Value"}],"description":"Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.1.0 to 2.11.0, flatCols expands file-loaded column ranges without validating Min and Max against the worksheet column limit. SetColWidth reaches flatCols, which expands xlsxCol.Min through xlsxCol.Max without enforcing MaxColumns. When a crafted worksheet supplies an oversized col max attribute and the application invokes a column mutator, flatCols performs a deep copy and append for every attacker-selected column number, allowing an attacker to consume excessive CPU and memory or trigger OOM. No fixed version is available as of this review.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Excelize: Unbounded \u003ccol max\u003e attribute is loaded with no MaxColumns check and expanded per-column by flatCols(), so any column mutator hangs or OOMs the process","id":"CVE-2026-107223","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"Excelize: A Zip64 uncompressed-size of 2^63 panics OpenFile/OpenReader","id":"CVE-2026-107224"},"packages":[{"ecosystem":"Go","fixed":["2.11.1-0.20260807015645-a54c578af309"],"introduced":["2.1.0"],"last_affected":[],"package":"github.com/xuri/excelize/v2","purl":null,"source":"GHSA-fq3v-74gv-27gm"},{"ecosystem":"Go","fixed":["2.11.1-0.20260807015645-a54c578af309"],"introduced":["2.1.0"],"last_affected":[],"package":"github.com/xuri/excelize/v2","purl":"pkg:golang/github.com/xuri/excelize/v2","source":"GHSA-fq3v-74gv-27gm"}],"prev":{"headline":"Excelize: GetConditionalFormats indexes conditional-formatting rule sub-elements with no length or nil check","id":"CVE-2026-107222"},"products":["excelize"],"published":"2026-10-07","related":[{"cvss_score":8.7,"headline":"Excelize: Unchecked pivot-cache field index in extractPivotTableFields causes unrecoverable panic","id":"CVE-2026-107211","kev_date_added":null,"published":"2026-10-07"},{"cvss_score":8.7,"headline":"Excelize: Nil-pointer dereference in GetSlicers when a worksheet has extLst present but no drawing element","id":"CVE-2026-107213","kev_date_added":null,"published":"2026-10-07"},{"cvss_score":8.7,"headline":"Excelize: Streaming GetRows row-bound bypass causes attacker-controlled allocation","id":"CVE-2026-59161","kev_date_added":null,"published":"2026-07-10"},{"cvss_score":7.5,"headline":"Excelize: Unbounded row number in Rows.Columns makes GetRows and the Rows iterator loop for days","id":"CVE-2026-107212","kev_date_added":null,"published":"2026-10-07"},{"cvss_score":7.5,"headline":"Excelize Decrypt: unrecoverable panics on malformed OLE/CFB encrypted workbooks","id":"CVE-2026-107214","kev_date_added":null,"published":"2026-10-07"},{"cvss_score":7.5,"headline":"Excelize: extractPart allocates attacker-controlled, unbounded and negative-sized buffers from CFB directory entries: remote panic / OOM DoS","id":"CVE-2026-107215","kev_date_added":null,"published":"2026-10-07"},{"cvss_score":7.5,"headline":"Excelize ANCHORARRAY: mutually-referencing array formulas recurse unboundedly via re-entrant CalcCellValue, causing a fatal stack overflow","id":"CVE-2026-107216","kev_date_added":null,"published":"2026-10-07"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-07","vendors":["qax-os"]},"summary":"Attackers can cause denial of service via memory exhaustion or CPU hang in Excelize by crafting spreadsheets with oversized column attributes.","url":"https://insights.sbomify.com/CVE-2026-107223/"}